Remove old Authentication code that we don't use or need.

remoting/client/chromoting_client.cc

Index: remoting/client/chromoting_client.cc
diff --git a/remoting/client/chromoting_client.cc b/remoting/client/chromoting_client.cc
index 87a7fe0fb16257c9b51d19c884e7d80992ed6879..13ba27c0a4082d3bb67b6aec2694d00712c35d39 100644
--- a/remoting/client/chromoting_client.cc
+++ b/remoting/client/chromoting_client.cc
@@ -203,27 +203,4 @@ void ChromotingClient::Initialize() {
   input_handler_->Initialize();
 }
 
-////////////////////////////////////////////////////////////////////////////
-// ClientStub control channel interface.
-void ChromotingClient::BeginSessionResponse(
-    const protocol::LocalLoginStatus* msg, const base::Closure& done) {
-  if (!message_loop()->BelongsToCurrentThread()) {
-    thread_proxy_.PostTask(FROM_HERE, base::Bind(
-        &ChromotingClient::BeginSessionResponse, base::Unretained(this),
-        msg, done));
-    return;
-  }
-
-  VLOG(1) << "BeginSessionResponse received";
-
-  // Inform the connection that the client has been authenticated. This will
-  // enable the communication channels.
-  if (msg->success()) {
-    connection_->OnClientAuthenticated();
-  }
-
-  view_->UpdateLoginStatus(msg->success(), msg->error_info());
-  done.Run();
-}
-
 }  // namespace remoting